Abstract: The technology relates to acoustic reflectometry systems and methods. An example system includes an acoustic sensor that includes a generator that emits acoustic pulses; and a sensor that detects the emitted acoustic pulses and reflections thereof. The system further includes a monitor, in communication with the acoustic sensor. The monitor performs operations including: receive patient data for a current patient receiving ventilation; provide the patient data as input to a trained clinical model; receive, as output from the trained clinical model, a clinically relevant threshold for an acoustically measurable parameter; process the detected incident and reflected waves to determine a value of the acoustically measurable parameter; compare the value of the acoustically measurable parameter to the clinically relevant threshold; and based on the comparison, generate a notification.

Abstract: A tracheal tube include a conformable conduit that forms a respiratory passage to transfer respiratory gases to a patient. A helical inflatable lumen is formed in or on an interior surface of the conformable conduit. Fluid transferred into the helical inflatable lumen causes the inflatable lumen to assume an expanded configuration to expand an outer diameter of the conformable conduit relative to an unexpanded configuration of the helical inflatable lumen. When in the expanded configuration and inserted in a patient, conformable walls of the conformable conduit expand outwards to contact the tracheal walls such that the conformable conduit is self-sizing to a patient's trachea size.

Abstract: The technology relates to methods and systems for recognition of conditions from ventilation data. The methods may include acquiring ventilation data for ventilation of a patient during a time period; generating an image based on the acquired ventilation data; providing, as input into a trained machine learning model, the generated image, wherein the trained machine learning model was trained based on images having a same type as the generated image; and based on output from the trained machine learning model, generating a predicted condition of the patient. The image may be generated by storing ventilatory data as pixel channel values to generate a human-indecipherable image.

Abstract: The technology relates to methods and systems for recognition of conditions from ventilation data. The methods may include acquiring ventilation data for ventilation of a patient during a time period; generating an image based on the acquired ventilation data; providing, as input into a trained machine learning model, the generated image, wherein the trained machine learning model was trained based on images having a same type as the generated image; and based on output from the trained machine learning model, generating a predicted condition of the patient. The image may be generated by storing ventilatory data as pixel channel values to generate a human-indecipherable image.

Abstract: The present disclosure relates generally to medical devices and, more particularly, to a gas mixing system for a medical ventilator. A gas mixer is provided to adjust the oxygen concentration of environmental air for a blower-based ventilator, by adjusting the mix of air upstream of the ventilator and providing the mixed air to the ventilator's environmental air inlet.

Abstract: Methods and systems for dynamically adjusting the compliance of a patient circuit. In an example, the technology relates to a medical ventilation system that includes a dynamic compliance circuit. The dynamic compliance circuit includes an inspiratory tube extending from an inhalation port of a medical ventilator, the inspiratory tube defining an inner lumen for carrying breathing gases from the inhalation port towards a patient; and a compliance adjustment covering coupled to the inspiratory tube, wherein adjustments to the compliance adjustment covering alter an effective compliance of the inspiratory tube. The system may also include a processor; and memory storing instructions that, when executed by the processor, cause the system to perform operations including, based a type of ventilation mode of the ventilator, causing an adjustment to the compliance adjustment covering to alter the effective compliance of the inspiratory tube.

Abstract: Systems and methods for controlling an exhalation valve to increase flow resistance during exhalation. An example method includes delivering breathing gases for a first breath; controlling the expiratory valve according to a first closure profile during a first exhalation phase of the first breath; detecting, by the flow sensor, an exhaled gas flow rate during the first exhalation phase; determining that the exhaled gas flow rate during the first exhalation phase is indicative of a collapsed airway during the first exhalation phase; based on determining that the exhaled gas flow rate is indicative of the collapsed airway, setting a second closure profile of the expiratory valve for a second exhalation phase wherein the second closure profile of the expiratory valve increases airflow resistance for the second exhalation phase of a second breath; and controlling the expiratory valve according to the second closure profile during the second exhalation phase.

Abstract: An acoustic sensor device including a proximal end connectable to a breathing circuit to receive breathing gases; a distal end connectable to the tracheal tube; a housing, between the proximal end and the distal end, defining a lumen through which the breathing gases flow; an acoustic generator within the housing and positioned to emit acoustic pulses into the lumen; an acoustic receiver within the housing and positioned distally from the acoustic generator; and a first gas property sensor within the housing and positioned proximally from the acoustic receiver, the first gas property comprising at least one of a flow sensor, a pressure sensor, a humidity sensor, or a temperature sensor.

Abstract: The present disclosure relates generally to medical devices and, more particularly, to a gas mixing system for a medical ventilator. A gas mixer is provided to adjust the oxygen concentration of environmental air for a blower-based ventilator, by adjusting the mix of air upstream of the ventilator and providing the mixed air to the ventilator's environmental air inlet.

Abstract: Systems and methods for collecting breathing gas properties via a medical ventilatory filter and wirelessly transmitting the data to another device. For example, the filter includes a first housing enclosing filtration media for filtering breathing gases flowing through the filter, the first housing defining a first port and a second port exposed to the breathing gases; and a sensor assembly. The sensor assembly includes a first sensor coupled to the first port, the first sensor configured to capture measurement data for a first gas property of breathing gases flowing through the filter; a second sensor coupled to the second port, the second sensor configured to capture measurement data for a first gas property of the breathing gases flowing through the filter; and a second housing. The second housing includes a processor and communication circuitry operative to wirelessly communicate the sensor data to a computing device located remotely from the filter.

Abstract: A steerable endoscope is provided that includes a tubular body with a plurality of wires that, when deflected in a non-axial direction, cause a distal end of the endoscope to change orientation. A controller for the endoscope generates instructions to cause the deflection of one or more of the plurality of wires according to a steering input.

Abstract: Methods to generate elongated wires having a metallic substrate thereon and devices comprising the same. In a method of generating a device, the method comprises the steps of applying a first nonconductive coating upon an elongated core body of the device; applying a first conductive coating upon the first nonconductive coating; applying a photoresist coating upon the first conductive coating; directing a laser/light from a laser/light source upon portions of the photoresist coating to cause said portions of the photoresist coating to harden; applying a first chemical to the photoresist coating to remove the photoresist coating that was not hardened by the laser/light; and applying a second chemical to the hardened photoresist coating to expose portions of the first conductive coating previously positioned below the hardened photoresist coating.

Abstract: The technology relates to methods and systems for recognition of conditions from ventilation data. The methods may include acquiring ventilation data for ventilation of a patient during a time period; generating an image based on the acquired ventilation data; providing, as input into a trained machine learning model, the generated image, wherein the trained machine learning model was trained based on images having a same type as the generated image; and based on output from the trained machine learning model, generating a predicted condition of the patient. The image may be generated by storing ventilatory data as pixel channel values to generate a human-indecipherable image.

Abstract: A humidifier, for a ventilation system, that includes an atomizer configured to deliver water droplets into a flow of breathing gases and a heating element configured to vaporize the water droplets emitted from the atomizer. The humidifier may be configured to set a target inhalation gas temperature based on internal temperature of a patient. Further, based on inspiratory flow and humidity data about breathing gases upstream of the atomizer of the humidifier, the humidifier may calculate and deliver an amount of water in one or more bursts of atomized water. Based on the target inhalation gas temperature, the humidifier may control a temperature of the heating element.

Abstract: A filter sterilization system includes an expiratory filter having filter material that collects pathogens present in the exhaled gas stream from a ventilated patient. A filter sterilizer includes an ultraviolet (UV) light source that is activated by the system to emit light towards the expiratory filter. Additionally, the system includes a ventilator coupled to a patient breathing circuit that provides a gas mixture from a gas source to the ventilated patient and transfers exhaled gases of the ventilated patient to the expiratory filter.

Abstract: Aspects of the disclosure describe a design that isolates concentrated oxygen from electrical and/or flammable components of a ventilator. In an example, ventilator components containing or otherwise interacting with concentrated oxygen are isolated from the electrical equipment and/or drained to an exterior of the housing of the ventilator, in case of a leak. For example, an isolating structure encases the concentrated oxygen-carrying components to prevent concentrated oxygen from inadvertently leaking into the inside of the housing of the ventilator. The isolating structure may be a sleeve. An isolation gas inside the isolating structure may be fluidly coupled with ambient air outside the housing of the ventilator to allow the escape of isolation gas outside of the ventilator housing.

Abstract: A tracheal tube include a conformable conduit that forms a respiratory passage to transfer respiratory gases to a patient. A helical inflatable lumen is formed in or on an interior surface of the conformable conduit. Fluid transferred into the helical inflatable lumen causes the inflatable lumen to assume an expanded configuration to expand an outer diameter of the conformable conduit relative to an unexpanded configuration of the helical inflatable lumen. When in the expanded configuration and inserted in a patient, conformable walls of the conformable conduit expand outwards to contact the tracheal walls such that the conformable conduit is self-sizing to a patient's trachea size.

Abstract: The present disclosure relates generally to medical devices and, more particularly, to a gas mixing system for a medical ventilator. A gas mixer is provided to adjust the oxygen concentration of environmental air for a blower-based ventilator, by adjusting the mix of air upstream of the ventilator and providing the mixed air to the ventilator's environmental air inlet.

Abstract: Methods and systems for remotely controlling one or more ventilators with a portable device. The portable device may receive a first proximity indication for a first ventilator of a plurality of ventilators, and based on receiving the first proximity indication, establish a first wireless connection between the device and the first ventilator. In addition, the device may receive and display ventilator data regarding ventilation of a patient with the first ventilator. Further, the device may receive a first touch input for a first alteration to a ventilator setting. A signal to change the setting may be transmitted to the ventilator.

Abstract: A system for digitally modelling analog devices having a processor executing an executable code to select a baseline calibration signal, receive a digitized audio from an analog device having parameters with incremental controls for the parameters, wherein the digitized audio is the baseline calibration signal processed with the incremental control of the first parameter set at a neutral setting, determine a baseline impulse response of the analog device, select an incremental signal, receive a plurality of incremental audios, wherein each incremental audio corresponds to the incremental signal processed by the analog device with a unique setting of the incremental control for the first parameter, derive formant-based filters for each of the incremental audios, and construct a digital model of the analog device based on the baseline impulse response of the analog device and the plurality of formant-based filter representations of the plurality of incremental audios.